Spray Nozzle Liquid Distribution Device for Reactor Quench Zones
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current reactor designs face challenges in efficiently distributing liquids over reactor beds, leading to uneven temperature and reaction conditions due to excessive space requirements for quench zones, which can result in reduced catalyst life and unstable reactions.
Innovation Solution
A device comprising a liquid collection tray, mixing chamber, and distribution tray with spray nozzles, utilizing vapor pipes to ensure uniform liquid distribution and reduce space, featuring a swirling motion to minimize thermal and compositional gradients, and allowing for flexible quench gas injection to maintain interfacial area for heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If complex mixing and distribution systems are used to control temperature and ensure uniform liquid distribution, then temperature control and reaction uniformity are improved, but the space required in the reactor chamber increases significantly
Solution Approach 1:
The distribution tray is segmented into multiple sections with individually adjustable nozzles, allowing each segment to be optimized for uniform liquid distribution without requiring a large overall system. The segmentation enables localized control of liquid flow patterns to achieve temperature uniformity while minimizing total space requirements.
Solution Approach 2:
The system employs adjustable and reconfigurable distribution nozzles that can be dynamically positioned and oriented to optimize liquid spray patterns. This dynamic capability allows the system to achieve uniform distribution and temperature control with a more compact footprint compared to fixed, complex mixing systems.
2Ease of operation
If the liquid distribution system is made insensitive to tray leveling issues, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
Each nozzle assembly is designed with local adjustment capabilities, allowing individual nozzles to be precisely aligned and angled to compensate for tray level variations. This localized quality control enables the system to maintain uniform liquid distribution even when the overall tray is not perfectly level, reducing the need for high manufacturing precision across the entire tray structure.
Solution Approach 2:
The distribution system incorporates self-adjusting features where the nozzle assemblies can be independently positioned and locked into place, allowing operators to compensate for leveling issues without requiring precision manufacturing of the entire tray. The system serves itself by providing built-in adjustment mechanisms that eliminate the need for external leveling equipment or procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces radial temperature gradients, enhances uniformity of liquid distribution, and decreases the overall size of reactor equipment, thereby improving processing efficiency and extending catalyst life while allowing for increased reactor bed volume without replacing entire processing columns.
Implementation Method 1
The liquid distribution tray comprises a tray, having a plurality of outlets. The device includes a plurality of spray nozzles, with a spray nozzle affixed to each liquid distribution outlet, and for delivering the liquid over the top of a catalyst bed.
Implementation Method 2
The device includes a plurality of vapor pipes, where each vapor pipe has an opening in fluid communication with the vapor space below the liquid distribution tray and an opening in fluid communication with the vapor space above the liquid collection tray. This provides a means for the vapor to provide the motive force for ensuring uniform liquid flow through each of the distributor tray openings, by eduction
Implementation Method 3
The collection tray passes the liquid to a mixing chamber through outlet ports that are oriented to deliver the liquid in a swirling motion in the mixing chamber.
Implementation Method 4
The mixing chamber mixes the liquid and is defined by the space between the liquid collection tray and the liquid distribution tray.
Data Source
Figure 1
Figure 2~3
AI summary
A liquid distribution device is presented for the collection and distribution of liquid between reactor or adsorbent beds. The device includes a liquid collection tray (12), a mixing chamber (16) in fluid communication with the liquid collection tray (12), a liquid distribution tray (18) in fluid communication with the mixing chamber (16), and a plurality of nozzles (22) for delivering the liquid over the top of a reactor or adsorbent bed.